<template>
  <div v-if="!item.hidden" class="menu-wrapper">
    <template v-if="hasOneShowingChild(item.children, item) && (!onlyOneChild.children || onlyOneChild.noShowingChildren) && !item.alwaysShow">
      <app-link v-if="item.redirect != 'noRedirect' && onlyOneChild.meta" :to="resolvePath(onlyOneChild.path)">
        <el-menu-item
          :index="resolvePath(onlyOneChild.path)"
          class="submenu-title-noDropdown"
        >
          <i class="el-icon-tickets" />
          {{ onlyOneChild.meta.title }}
        </el-menu-item>
      </app-link>
    </template>
    <el-submenu
      v-else
      ref="subMenu"
      :index="resolvePath(item.path)"
      popper-append-to-body
    >
      <template slot="title">
        <item
          v-if="item.meta"
          :icon="item.meta && item.meta.icon"
          :title="item.meta.title"
        />
      </template>
      <sidebar-item
        v-for="child in item.children"
        :key="child.path"
        :item="child"
        :base-path="resolvePath(child.path)"
        class="nest-menu"
      />
    </el-submenu>
  </div>
</template>

<script>
import path from 'path'
import { Validator } from '@bigbighu/cms-utils'
import Item from './Item'
import AppLink from './Link'
// import FixiOSBug from './FixiOSBug'

export default {
  name: 'SidebarItem',
  components: { Item, AppLink },
  // mixins: [FixiOSBug],
  props: {
    // route object
    item: {
      type: Object,
      required: true
    },
    basePath: {
      type: String,
      default: ''
    }
  },
  data() {
    // To fix https://github.com/PanJiaChen/vue-admin-template/issues/237
    // TODO: refactor with render function
    this.onlyOneChild = null
    return {}
  },
  methods: {
    hasOneShowingChild(children = [], parent) {
      const showingChildren = children.filter(item => {
        if (item.hidden) {
          return false
        } else {
          // Temp set(will be used if only has one showing child)
          return true
        }
      })

      // When there is only one child router, the child router is displayed by default
      // if (showingChildren.length === 1) {
      //   return true
      // }

      // Show parent if there are no child router to display
      if (showingChildren.length === 0) {
        this.onlyOneChild = { ...parent, path: '', noShowingChildren: true }
        return true
      }
      console.log(children, 'children')
      return false
    },
    resolvePath(routePath) {
      console.log(this.onlyOneChild, 'onlyOneChild')
      console.log(path.resolve(this.basePath, routePath), 'routePath')
      if (Validator.isExternal(routePath)) {
        return routePath
      }
      if (Validator.isExternal(this.basePath)) {
        return this.basePath
      }
      return path.resolve(this.basePath, routePath)
    }
  }
}
</script>

<style lang="less" scope>
#app .hideSidebar .el-submenu > .el-submenu__title .iconfont {
  margin-left: 18px;
}
#app .el-menu-item {
  display: flex;
  align-items: center;
}
#app .el-menu-item [class^=el-icon-] {
  font-size: 20px;
}
</style>
